Question about McCulloch 16 In 4.5 Hp Electric Chainsaw With Carrying Case MCC4516FK

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Mac 3200. starts easy. dies when throttle applied. what can I DO

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Engine should be warmed up somewhat--try turning the high-speed-mixture-adjustment counter-clockwise about 1/4 turn (richer fuel mix). If this helps, the correct setting should be: 4-stroking at high speed with no cutting, but smooths out with light load (cutting wood)

Posted on Jul 03, 2009

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I've got the same plroblem, let me know if you get advice from the expert.

Posted on Jul 02, 2009


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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2001 saturn L-series 3.0 dies after starting

You mentioned that some of the couplers for the intake runners are (were) split. I don't think that has anything to do with your problem, but it gives me an idea.

If the vacuum hose leading to your MAP sensor is also split/crushed/broken then the MAP sensor will never register any manifold vacuum. The only time that reading would be right would be when the car was at WOT. This theory alone does not explain why your car does not run, though because your car also has a mass airflow sensor. It should be able to run if either one of those sensors fails (but not both - or at least not very well with both failed). Did your car display a "check engine" light before the current condition developed? Does it have one now?

I would check the hose leading to the MAP sensor (if there is one - now that I look more closely at the drawings, it doesn't look like there is a hose). The MAP is on the top of the intake manifold on the rear bank above the cylinder closest to the driver's side of the car. It is held in by one bolt.

Can you retrieve any stored codes? Stores like Autozone will scan a car for its codes for free, but they don't make "house calls."

After typing all the above information, something new has occurred to me:

Your car has a drive-by-wire throttle. Idle speed is controlled by the electronic throttle valve. If you remove the tube that connects the throttle valve to the air cleaner, you should be able to see the throttle plate. Does it move appropriately for the amount of accelerator pedal input? For example, if you apply roughly 10% throttle, does the plate open roughly 10% of the way?

Your engine computer may just need to re-learn the position of the throttle plate. To do this, with your foot off the accelerator, turn the ignition to the "run" position, but do not attempt to start the car. After 30 seconds, the engine should begin the relearn sequence. If there are any TPS-related codes stored, the ECU will not attempt to run the relearn sequence, so you'll need to diagnose why that isn't working.

Anyway, this second option fits your symptoms a bit better than the first, and could indicate a failed throttle position sensor, accelerator position sensor, throttle actuator, wiring, or engine computer.

By the way, inability to rev above 3200 RPM may not be a problem. Some cars with automatic transmissions are limited and will not rev above a certain speed when in neutral or park. That said, if the throttle valve was not opening all the way because it was faulty, that would be a different story.

Jun 05, 2009 | 2001 Saturn S-Series

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